Spring-jack-mounting plate.



No- 856,956. PATENTED JUNE 11, 1907 H. P. HIBBARD.

SPRING JACK MOUNTING PLATE.

PPPPPPPPPPPPPPPPP 01229.19.

M ll 0 I ULU w7aesa es 7206725 07! UNITE STATES PATENT OFFICE.

HARRY P. HIBBARD, OF CHICAGO, ILLINOIS, ASSIGNOR TO IVESTERN ELECTRIC COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SPRlNG-dACK-MOUNTING PLATE.

Specification of Letters Patent.

Patented June 11, 1907.

T0 at when zit m/agl 0071100772 Be it known that I, IIARRY I IIIBBARD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Spring-Jack)Iounting Plates, of which the following is a full, clear, concise, and exact description.

My invention relates to supporting plates for springjaeks, and has for its object to provide an improved and simple construction which will permit the plate to be easily secured in place within the switchboard.

In telephone switehboards, the springjacks are mounted in strips, which are built up one on another, each strip containing a number of springjacks mounted on a supporting plate, which is secured at its ends to vertical members within the board. In accordance with my invention I employ a supporting plate carrying at each end a clamping lug formed of angular sheet metal, whereby the plate and lugs may be stamped from a single piece of metal. The plates are placed in the board with the front ends of their clamping lugs in engagement with the vertical members, and fastening devices, such as screws, are then inserted into the vertical members, and washers carried thereby are forced against the rear ends of the lugs, clamping the plates in place. I preferably lock the adjoining ends of two plates in place by a single fastening device, the washer whereof engages the lugs on the opposing ends of two adjoining plates, these lugs lying parallel with each other, with their front ends in engagement with the same vertical post.

I will describe my invention by reference to the accompanying drawing, which illustrates the preferred form thereof, reserving for the appended claims a statement of the parts and improvements which I deem novel with me.

In the drawings, Figure 1 is a plan view of a supporting plate embodying my invention, showing a number of springjacks sup ported thereby Fig. 2 is a front view of the same; and Fig. 3 is a detail perspective view of the plate.

Similar letters of reference designate like parts throughout the several views.

The supporting plate a is provided with upturned ends a a against the inner surfaces whereof the ends of a strip of jacks, carried by the plate, are adapted to abut, the outer surfaces of said ends being provided with clamping lugs b b of angular sheet metal against the rear ends whereof washe s carried by suitable fastening devices are adapted to engage.

Each lug comprises a strip extending from the upper edge of its supporting end a outwardly, level with the upper edge of the end a, (.lowmvardly and inwardly, back to the outer surface of the end a. A sheet metal clamping lug of angular cross section is thus formed, which may be formed integrally with the end of the plate, the whole str uc ture-that is, the plate and lugs, being stamped out of a single piece of metal. The top walls of the lugs being level with the upper edges of the ends a, permit the strlps to be conveniently built up without loss of space.

I claim 1- 1. The combination with a springjack supporting plate, of angular clamping lugs formed of sheet metal secured at the ends of said plate.

2. The combination with a springjack supporting plate having upturned ends, of a clamping lug at each end thereof, said lugs comprising strips extending angularl} from the outer surfaces of said ends and back to said ends.

3. The combination with a springjack supporting plate having upturned ends, of a clamping lug at each end thereof, said lugs comprising strips extending from the upper edges of said ends, outwardly, downwardly and inwardly back to said ends, said strips being formed inte rally with the ends of said plate.

4. A sheet metal stamping adapted for use as a spring jack mounting, and comprising a plate having upturned ends carrying on their outer surfaces bent strips forming clamping lugs.

In witness whereof, I, hereunto subscribe my name this 26th day of October A, D., 1905.

HARRY P. IIIBBARD.

IVitnesses BERT STARR YORK, E. F. BEAUBIEN. 

